专利名称：Duplex filter asmbly 发明人：Daniel W. Miller
思维的基本特征申请号：US07/040468
申请日：19870420
公开号：US04786409A印章的制作
投标文件密封>雉鸡公开日：
19881122尽量的英文
专利内容由知识产权出版社提供
夸耀的反义词
摘要：Duplex filter apparatus suitable for pressure or suction applications includes dual filter housings and a central valve housing having dual, cylindrical, three-way plug valves. Four glass-filled Teflon sleeve als, each having an inner cylindrical cut edge conform to the valve periphery and al the valve openings in either a pressure or suction configuration. A wave spring bias each sleeve al against the plug valve and further o-ring als utilize the pressure or suction condition to enhance the effectiveness of the sleeve als. In the pressure configuration a tubular support is ud in conjunction with the sleeve al with the wave spring acting either directly on the sleeve al or indirectly through an intermediate metal ring which hous the o- ring als and which minimizes thermal expansion effects. Interlock mechanisms are associated with a handle which rotates the plug valve between off-duty and on-duty filter housings to assure that the filter housing cover cannot be opened while on-duty, nor that the valve can be turned without the off-duty housing prepared for fluid. The interlock mechanisms compri mechanical detents and levers interconnected with the handle and the filter housing covers.
三到申请人：PARKER-HANNIFIN CORPORATION
皮肤毛孔粗大代理人：Joph B. Balazs
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